Information card for entry 7208852

Structure parameters

• Chemical name: Tetracalcium difluoride disilicate
• Formula: Ca4 F2 O7 Si2
• Calculated formula: Ca16 F8 O28 Si8
• Title of publication: Crystal structure of blue‒white‒yellow color-tunable Ca4Si2O7F2:Eu2+,Mn2+ phosphor and investigation of color tunability through energy transfer for single-phase white-light near-ultraviolet LEDs
• Authors of publication: Huang, Chien-Hao; Chan, Ting-Shan; Liu, Wei-Ren; Wang, De-Yin; Chiu, Yi-Chen; Yeh, Yao-Tsung; Chen, Teng-Ming
• Journal of publication: Journal of Materials Chemistry
• Year of publication: 2012
• Journal volume: 22
• Journal issue: 38
• Pages of publication: 20210
• a: 7.55 Å
• b: 10.43 Å
• c: 10.85 Å
• α: 90°
• β: 69.93°
• γ: 90°
• Cell volume: 802.515 ų
• Number of distinct elements: 4
• Space group number: 14
• Hermann-Mauguin space group symbol: P 1 21/c 1
• Hall space group symbol: -P 2ybc
• Has coordinates: Yes
• Has disorder: No
• Has Fobs: No